[PATCH net-next v5 2/2] tools: ynl: add unicast notification receive support
From: Minxi Hou <hidden>
Date: 2026-05-22 17:42:21
Also in:
lkml
Subsystem:
networking [general], the rest, yaml netlink (ynl) · Maintainers:
"David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Linus Torvalds, Donald Hunter
Add ntf_bind() method to YnlFamily for binding the netlink socket without joining a multicast group. This enables receiving unicast notifications through the existing poll_ntf/check_ntf path. The OVS packet family sends MISS and ACTION upcalls via genlmsg_unicast() to a per-vport PID rather than through a multicast group. The existing ntf_subscribe() couples bind() with setsockopt(ADD_MEMBERSHIP), which does not fit the unicast case. ntf_bind() provides the bind-only alternative, with the address defaulting to (0, 0) but exposed as an explicit argument. Signed-off-by: Minxi Hou <redacted> --- tools/net/ynl/pyynl/lib/ynl.py | 5 +++++ 1 file changed, 5 insertions(+)
diff --git a/tools/net/ynl/pyynl/lib/ynl.py b/tools/net/ynl/pyynl/lib/ynl.py
index 010aac0c6c67..092d132edec1 100644
--- a/tools/net/ynl/pyynl/lib/ynl.py
+++ b/tools/net/ynl/pyynl/lib/ynl.py@@ -682,6 +682,7 @@ class YnlFamily(SpecFamily): ynl.ntf_subscribe(mcast_name) -- join a multicast group ynl.ntf_listen_all_nsid() -- listen on all netns + ynl.ntf_bind(addr=(0, 0)) -- bind socket for unicast notifications ynl.check_ntf() -- drain pending notifications ynl.poll_ntf(duration=None) -- yield notifications
@@ -767,6 +768,10 @@ class YnlFamily(SpecFamily): return None return None + def ntf_bind(self, addr=(0, 0)): + """Bind socket for receiving unicast notifications.""" + self.sock.bind(addr) + def set_recv_dbg(self, enabled): self._recv_dbg = enabled
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2.54.0